8 Basic understanding of the Internet and the Web

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26 Οκτ 2013 (πριν από 3 χρόνια και 11 μήνες)

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BASIC UNDERSTANDING
OF

INTERNET AND WEB


BRIDGE COURSE

of

INFORMATION & COMMUNICATION
TECHNOLOGY

Activity No. 8

Objective s of the activity

On the completion of this activity, students are able to



Learn basics of Internet


Know types of Network


Learn how to access the Internet


Learn the structure of World Wide Web (www)

2

Types of Network

3

Network

:

It

is

a

collection

of

interconnected

computers

and

other

devices

to

share

information

,

files

and

hardware

resources
.

Basic

Types

:


LAN


MAN


WAN




LOCAL AREA NETWORK

4

A

LAN

(local

area

network)

is

a

group

of

computers

and

network

devices

connected

together,

usually

within

the

same

building

/

site
.


METROPOLITAN AREA NETWORK

5

A

MAN

(metropolitan

area

network)

is

a

larger

network

that

usually

spans

several

buildings

in

the

same

city

or

town
.

A

metropolitan

area

network

(MAN)

is

a

network

that

interconnects

users

with

computer

resources

in

a

geographic

area

or

region

larger

than

large

local

area

network

(LAN)

but

smaller

than

the

area

covered

by

a

wide

area

network

(WAN)
.

WIDE AREA NETWORK

6


A

wide

area

network

(WAN)

is

a

computer

network

that

spans

a

relatively

large

geographical

area

and

consists

of

two

or

more

interconnected

local

area

networks

(LANs)


The Internet is an example of a worldwide public WAN.


What is the Internet?

7


Internet

is

an

inter
-
connection

between

several

computers

of

different

types

belonging

to

various

networks

all

over

the

globe
.



It is a network of networks.

WHAT IS WEB ?

8


The

Web

is

a

world

of

information

available

at

the

click

of

a

mouse
.

To

use

it,

you

need

a

computer/Smart

phones,

a

connection

to

the

Internet,

and

a

Web

browser
.


WWW

(World

Wide

Web)

:

WWW

is

a

series

of

servers

that

are

interconnected

through

hypertext
.



Hypertext

is

a

method

of

presenting

information

in

which

certain

text

is

highlighted

(Hyperlink)

that,

when

selected,

displays

more

information

on

the

particular

topic
.
















Common Terminologies related to www are:

9

Web Browser

Web Server

Homepage

HTML

HTTP

URL

ISP

Web Browser

10


Web

Browser


The

browser

is

the

program

which

is

necessary

for

surfing

the

internet
.


For

Example

:

Google

Chrome

Mozilla

Firefox


Opera


Safari


Internet

Explorer





Web Server

11


Web

server

is

a

place

where

web

pages

reside
.

When

User

request

,

it

responds

with

required

web

page

on

user’s

computer
.

HomePage,HTML,HTTP

12


Home

page

is

the

first

hypertext

document

displayed

when

the

user

follows

a

link

to

the

Web

server
.



Hypertext

Markup

Language

(HTML)

is

the

encoding

scheme

used

to

create


a

Web

document
.



Hypertext

Transfer

Protocol

(HTTP)

is

a

protocol

used

on

the

Web

to

transfer

hypertext

documents
.

A

protocol

is

a

set

of

rules

that

the

computers

use

to

communicate

logically
.



URL,ISP

13


Uniform

Resource

Locator

(URL)

is

a

Web

addressing

scheme

that

spells

out

the

exact

location

of

an

Internet

resource
.

When

the

user

clicks

on

a

link,

the

browser

reads

the

link

to

the

document
.

The

information

about

the

link

is

provided

to

the

browser

by

the

URL
.






http
:
//

www
.
google
.
com




http
:
//

www
.
gtu
.
ac
.
in




Internet

Service

Provider

(ISP)

:

An

Internet

service

provider

(ISP,

also

called

Internet

access

provider)

is

a

business

or

organization

that

offers

users

access

to

the

Internet

and

related

services
.




ACCESSING INTERNET

14




To access internet , users need to contact ISP

like BSNL , MTNL etc.







Entering a URL in Browser

15

Location Box

Enter

URL’s
here

(or

Web Address
)

http
://www.gmail.com

http
://www.gmail.com

Press
Enter

Response in web browser

16

References

17



http://en.wikipedia.org


http://en.wikipedia.org/wiki/Computer_network


http://www.google.com/imghp